diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index f54551e..9d86f4e 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -9033,7 +9033,8 @@
 
     private void updateDefaultNetworksForOemNetworkPreference(
             @NonNull final Set<NetworkRequestInfo> nris) {
-        handleRemoveNetworkRequests(mDefaultNetworkRequests);
+        // Pass in a defensive copy as this collection will be updated on remove.
+        handleRemoveNetworkRequests(new ArraySet<>(mDefaultNetworkRequests));
         addPerAppDefaultNetworkRequests(nris);
     }